All categories

2 years ago

Verify cos^4x-sin^4x=cos2x

Mathematics

1 answer:

kati45 [8]2 years ago

7 0

A^2 - b^2 = (a - b)( a +b);
<span>cos^4x-sin^4x =( cos^2x + sin^2x )( cos^2x - sin^2x) = 1* cos2x = co2x.</span>

You might be interested in

Help me plz ok thank you

Gwar [14]

Answer:

If there is no 48 divided by 8 then it is 8 x _ = 48.

Step-by-step explanation:

Think about it. There are 6 times more children than adults *6 x 8 = 48.

3 0

2 years ago

Read 2 more answers

On a map the key indicates that one inch equals 50 miles. It is 600 miles from Ricky's house to the Willis tower in Chicago. Wha

Sloan [31]

600/50=12
so the answer will be 12 inches

6 0

3 years ago

Find the volume of a right circular cone that has a height of 3.9 ft and a base with a circumference of 16.3 ft. Round your answ

MissTica

Answer:

The answer to your question is Volume = 27.5 ft³

Step-by-step explanation:

Data

Volume = ?

height = 3.9 ft

Circumference = 16.3 ft

Process

1.- Calculate the radius of the Cone

Circumference = 2πr = 16.3 ft

-Solve for r

r = 16.3/2π

r = 16.3/6.28

r = 2.5955 ft

2.- Calculate the volume

Volume = 1/3πr²h

-Substitution

Volume = 1/3(3.14)(2.5955)²(3.9)

-Simplification

Volume = 1/3(82.4966)

-Result

Volume = 27.5 ft³

8 0

3 years ago

Read 2 more answers

Evaluate 8+3e when e= 2.

trapecia [35]

$\text{Hey there!}$

$\text{If e = 2 then replace the e in the equation to 2}$

$\mathsf{8+3e}\\\mathsf{= 8+3(2)}\\\mathsf{3(2)=6}\\\mathsf{8+6=14}\\\\\boxed{\boxed{\mathsf{Answer: \boxed{\mathsf{14}}}}}\checkmark$

$\text{Good luck on your assignment and enjoy your day!}$

~ $\dfrac{\frak{LoveYourselfFirst}}{:)}$

5 0

2 years ago

Read 2 more answers

Solve for u<br> 7=u/4-16

artcher [175]

Answer:

u=92

Step-by-step explanation:

Like and give 5 star rating

7 0

2 years ago